Examine source code of anime dark theme 01

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "anime dark theme 01",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(21, 21, 21, 0)",
      "toolbar_text": "rgb(204, 204, 204)",
      "frame": "rgb(21, 21, 21)",
      "tab_background_text": "rgb(204, 204, 204)",
      "toolbar_field": "rgba(32, 32, 34, 0.6)",
      "toolbar_field_text": "rgb(204, 204, 204)",
      "tab_line": "rgba(21, 21, 21, 0)",
      "popup": "rgb(32, 32, 34)",
      "popup_text": "rgb(204, 204, 204)",
      "tab_selected": "rgba(204, 204, 204, 0.1)",
      "toolbar_bottom_separator": "rgba(21, 21, 21, 0)",
      "toolbar_top_separator": "rgba(21, 21, 21, 0)",
      "tab_loading": "rgba(21, 21, 21, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6605885-8ece-45eb-a787-5e4c83c3cef2}"
    }
  }
}